BLACK HOLE : an invisible denizen of our universe!

Well, what stuff hits your mind after thinking about Black hole? A dark enormous monster who engulfs whatever comes its way? That makes me giggle at it. Black hole is such a funky quite broad concept which has lots of secrets tugged inside. Have anyone been in a black hole ever? Well I have had been through it but in my beautiful world of fantasy. I know I sound shitty now.

Well, here are my manners being more authentic; a ‘black hole’ is where gravity has become so strong that nothing around it can escape, not even light. The mass of a black hole is so compact, or dense, that the force of gravity is too strong for even light to escape. Black holes ripping stars apart, a process that releases a tremendous amount of energy was observed by Scientists.

Ever wondered how the first black hole was discovered? It was by X-ray astronomy that bought us across this concept. Black hole is a region of space time (the 4-dimensional conceptual model combining the three dimensions of space and the dimension of time) surrounding a point of infinite density, the singularity, where both space and time break down, where the space time defining that precise location would cease to exist. Around that point, in a region, bound by the event horizon, from which neither particles nor any form of electromagnetic radiation can escape. That breaks up your ears? As nothing can escape a black hole — not visible light, infrared light, microwaves or any other form of radiation — black holes are invisible. So astronomers have had to “observe” them by studying how they affect their surroundings. For example, black holes often form powerful, bright jets of gas and radiation that are visible to telescopes. Physicists can use the size of that jet to estimate the size of the black hole responsible for the jet.

Lots of theories are discovered about black hole yet more left to be discovered. But what astonished me is knowing that even black holes completely evaporate and disappear but they take so long as longer than current age of the Universe. Um! Sorry but may ne we won’t get any photos of this scenario .

Although black holes cannot be seen, we know they exist from the way they affect nearby dust, stars and galaxies. Many of them are surrounded by discs of material. As the discs swirl around them like a whirlpool, they become extremely hot and give off X-rays. They come in many different sizes. Many of them are only a few times more massive than the Sun. These ‘stellar-mass’ black holes form when a heavyweight star, about 10 times heavier than the Sun, ends its life in a supernova explosion. What is left of the star – still several solar masses – collapses into an area only a few kilometres across. Most galaxies, including the Milky Way, have ‘supermassive black holes’ at their centres. These may be millions or billions of times heavier than our Sun.

Supermassive black holes also power active galaxies and ancient galaxies known as quasars. Quasars may be hundreds of times brighter than even the largest ordinary galaxies. Objects that fall into black holes are literally stretched to breaking point. An astronaut who ventured too close and was sucked into a black hole would be pulled apart by the overpowering gravity. That sounds scary and creates one more stumbling block to keep the theories of black hole undiscovered.
A photograph launched in 2019 revealed some pieces of information of Black hole it does look like “ring of fire” surrounding a perfectly circular dark hole as I term it so. Interestingly, the bright halo is caused by superheated gas falling into the hole and made black hole kinda reddish that’s hilarious like black hole got a red colour as its new friend.

Let’s peep deeper, a black hole isn’t truly a hole. It’s quite the opposite. A black hole is a place in space containing an enormous amount of mass packed very tightly together. And it has the capacity to draw in more mass all the time. These objects have so much mass — and therefore gravity — that nothing can escape them, not even light. That makes them some of the most extreme objects in the universe. And they aren’t just massive, but also dense. Density is a measure of how tightly mass is packed into a space. Imagine a black hole the size of New York City. It would have as much mass and gravity as our sun. Most black holes form after a giant star, one at least 10 times as massive as our sun, runs out of fuel and collapses. The star shrinks and shrinks and shrinks. Eventually, it forms a tiny dark point. This is known as a stellar-mass black hole. Now much smaller than the star that made it, this black hole still has the same mass and gravity.

Our galaxy the Milky Way may have some 100 million such black holes. Astronomers estimate a new one forms every second. Note that small- and medium-sized stars, such as the sun, cannot form black holes. When they run out of fuel, they just become small, planet-sized objects called white dwarfs.

Apparently, how can be black holes detected? As studied above Black holes are characterised by their extremely strong gravity, that doesn’t allow even light to escape; as a result, black holes are invisible. However they can be detected if they have a close companion star. The gravity of the black hole pulls the gas from the other star. The gravity of the black hole pulls the gas from the other star, forming an accretion disc that spirals around the black hole at high speed, heating up and emitting radiation. Eventually, the matter spirals in to cross the horizon i.e the boundary of the black hole.

This article of BLACK HOLE is by Anushka Sharad, a teen girl, who finds Astrophysics as a fascinating career. These immensely dense and invisible denizens of our universe are also among the most extreme. Support and let us know your reviews to come up with more engrossing and captivating stuffs related to Space and its family, and we assure you will love’em all and y’all wouldn’t take your hands of it!